<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>页面未找到 - 404错误</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
            color: #fff;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 20px;
        }
        
        .container {
            max-width: 600px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
            padding: 40px 30px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .error-code {
            font-size: 120px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1;
            text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.2);
        }
        
        .error-title {
            font-size: 32px;
            margin-bottom: 15px;
            color: #fff;
        }
        
        .error-message {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 30px;
            line-height: 1.5;
        }
        
        .home-button {
            display: inline-block;
            background: #fff;
            color: #6a11cb;
            text-decoration: none;
            padding: 12px 35px;
            border-radius: 50px;
            font-size: 18px;
            font-weight: 600;
            transition: all 0.3s ease;
            border: 2px solid transparent;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .home-button:hover {
            background: transparent;
            color: #fff;
            border-color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
        }
        
        /* 动画效果 */
        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
            100% { transform: translateY(0px); }
        }
        
        .error-code {
            animation: float 3s ease-in-out infinite;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .error-code {
                font-size: 80px;
            }
            
            .error-title {
                font-size: 26px;
            }
            
            .error-message {
                font-size: 16px;
            }
            
            .container {
                padding: 30px 20px;
            }
        }
        
        @media (max-width: 480px) {
            .error-code {
                font-size: 60px;
            }
            
            .error-title {
                font-size: 22px;
            }
            
            .home-button {
                padding: 10px 25px;
                font-size: 16px;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <h1 class="error-code">404</h1>
        <h2 class="error-title">页面未找到</h2>
        <p class="error-message">抱歉，您访问的页面不存在。可能已被移动或删除，或者您输入的地址有误。</p>
        <a href="/" class="home-button">返回首页</a>
    </div>
</body>
</html>